Castrol XR 77 is a high performance oil, 100% synthetic 2-stroke engines forcompetition. Since the launch of Castrol A 747 in 1976, many technical developments have emerged in the middle of motorcycle racing, particular, the engine outputs from 300 hp to 400 hp per liter displacement. The design of today's engines can also use unleaded fuel, the design and properties are different from other fuels and that, without loss of performance. The new Castrol XR77 2T Racing Oil replaces the A747 oil. The A747 won't be sold anymore.
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